Maybe the engines will run a long time but the owners will spend a lot more money keeping everything else working.
That just would not work in most cases. There is a simple reason the Google car was stopped, it was not safe for it to proceed forward. Either another car was directly in front or it was an intersection with traffic coming from 90 degree angles.
I'm always looking for a new idea that will be more productive than its cost. -- David Rockefeller